diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/SmmServicesTableLib | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/SmmServicesTableLib')
3 files changed, 135 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c new file mode 100644 index 000000000..0f611cd25 --- /dev/null +++ b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.c @@ -0,0 +1,79 @@ +/** @file
+ SMM Services Table Library.
+
+ Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiSmm.h>
+#include <Protocol/SmmBase2.h>
+#include <Library/SmmServicesTableLib.h>
+#include <Library/DebugLib.h>
+
+EFI_SMM_SYSTEM_TABLE2 *gSmst = NULL;
+
+/**
+ The constructor function caches the pointer of SMM Services Table.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+SmmServicesTableLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_SMM_BASE2_PROTOCOL *InternalSmmBase2;
+
+ InternalSmmBase2 = NULL;
+ //
+ // Retrieve SMM Base2 Protocol, Do not use gBS from UefiBootServicesTableLib on purpose
+ // to prevent inclusion of gBS, gST, and gImageHandle from SMM Drivers unless the
+ // SMM driver explicitly declares that dependency.
+ //
+ Status = SystemTable->BootServices->LocateProtocol (
+ &gEfiSmmBase2ProtocolGuid,
+ NULL,
+ (VOID **)&InternalSmmBase2
+ );
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (InternalSmmBase2 != NULL);
+
+ //
+ // We are in SMM, retrieve the pointer to SMM System Table
+ //
+ InternalSmmBase2->GetSmstLocation (InternalSmmBase2, &gSmst);
+ ASSERT (gSmst != NULL);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This function allows the caller to determine if the driver is executing in
+ System Management Mode(SMM).
+
+ This function returns TRUE if the driver is executing in SMM and FALSE if the
+ driver is not executing in SMM.
+
+ @retval TRUE The driver is executing in System Management Mode (SMM).
+ @retval FALSE The driver is not executing in System Management Mode (SMM).
+
+**/
+BOOLEAN
+EFIAPI
+InSmm (
+ VOID
+ )
+{
+ //
+ // We are already in SMM
+ //
+ return TRUE;
+}
diff --git a/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf new file mode 100644 index 000000000..17d7b3154 --- /dev/null +++ b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.inf @@ -0,0 +1,40 @@ +## @file
+# SMM Services Table Library.
+#
+# Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = SmmServicesTableLib
+ MODULE_UNI_FILE = SmmServicesTableLib.uni
+ FILE_GUID = 064B4C5B-C5EF-4eff-85DF-65518EF1314D
+ MODULE_TYPE = DXE_SMM_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SmmServicesTableLib|DXE_SMM_DRIVER
+ PI_SPECIFICATION_VERSION = 0x0001000A
+ CONSTRUCTOR = SmmServicesTableLibConstructor
+
+#
+# VALID_ARCHITECTURES = IA32 X64
+#
+
+[Sources]
+ SmmServicesTableLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ DebugLib
+
+[Protocols]
+ gEfiSmmBase2ProtocolGuid ## CONSUMES
+
+[Depex]
+ gEfiSmmBase2ProtocolGuid
+
diff --git a/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.uni b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.uni new file mode 100644 index 000000000..729a4ae21 --- /dev/null +++ b/roms/edk2/MdePkg/Library/SmmServicesTableLib/SmmServicesTableLib.uni @@ -0,0 +1,16 @@ +// /** @file
+// SMM Services Table Library.
+//
+// SMM Services Table Library.
+//
+// Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "SMM Services Table Library"
+
+#string STR_MODULE_DESCRIPTION #language en-US "SMM Services Table Library."
+
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